Noticed these classes are not available any more in version 18.104.22.168.
Is there any major change in EMA API?
I have found all the classes above in EMA 22.214.171.124 as shown in the eclipse IDE below:
You can download EMA 126.96.36.199 shipped with Elektron SDK - Java - 1.2.1 on Elektron SDK - Java Downloads page
Hope this help.